Emergencies: 919-513-6911

Radiation Oncology

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A diagnosis of cancer in pets is increasingly common as our companion animals live longer due to a lifetime of excellent care. Although cancer can occur in pets of any age, there is an increasing risk of most cancers with age. Pet owners should be vigilant about looking for clinical signs that could be related to cancer, such as non-healing wounds, lumps or bumps on the skin or in the mouth, and lameness. It is the task of veterinarians to examine and investigate the underlying cause of such abnormalities. A diagnosis of cancer may come from a blood test, x-rays, or needle aspirates of lesions. Once a pet is diagnosed or suspected of having cancer, a veterinary oncologist is the health professional best trained to further stage and recommend treatments for your pet’s disease.

Typically, cancers may be treated with combinations of surgery, chemotherapy, radiation therapy, and sometimes immunotherapy. In the past, radiation therapy was commonly used to treat cancers that were non-resectable by surgeons or for tumors that were incompletely removed at surgery. Although radiation is still used in this way today, the advent of many new technologies that we now have available at NC State now allows us to consider radiation therapy for cancers that were previously thought to be untreatable, such as large liver tumors or metastatic brain tumors.

We are fortunate to have cutting-edge technology available in the form of a Varian Novalis TX linear accelerator with a Protura six-degrees-of-freedom treatment couch. This allows us to deliver radiation treatments with extreme precision, which results in decreased normal tissue side effects and the ability to increase the radiation dose to the tumor, hopefully improving tumor control. We can deliver radiation via photons or electrons, using both traditional (electron beam and clinical photon radiation plans) and cutting-edge radiation treatment plans (stereotactic radiation therapy (SRT) and intensity-modulated radiation therapy (IMRT)).

Radiating Hope: Our Online Newsletter!

Front page screenshot of Radiation Oncology newsletter

Highlights include:

  • Interesting cases
  • Clinical & benchtop research
  • Ways to support Radiation Oncology

Cancer Types:

Cancer can affect any part of the body. This list of cancer types are those that are most commonly treated with radiation therapy. Click each title to learn more:

Bladder & Prostate Cancer

Bone Cancer

Brain Tumors

Nasal Cancer

Service features include:

  • Two American College of Veterinary Radiology, Specialty of Radiation Oncology board-certified Radiation Oncologists
  • State-of-the-art 3-dimensional treatment planning system (Varian Eclipse)
  • Varian On-Board Imaging (OBI) device that allows daily imaging prior to radiation delivery for precise patient positioning
  • In-house boarding for patients
  • Varian Novalis TX Linear Accelerator with Stereotactic Radiation Therapy (SRT) and Intensity-Modulated Radiation Therapy (IMRT) capabilities


Phone: 919.513.6690
Fax: 919.513.6669
Hours: Monday-Friday, 7:30AM-4:30PM
Facility: The Terry Center
DVM Referral Form: Radiation Oncology Referral Form

Appointment Guidelines
The Radiation Oncology service is a referral-only service. Once the primary (referring) veterinarian calls and sets up the referral, the owner may call and arrange an appointment. If your veterinarian has confirmed the diagnosis of cancer in your pet, have he or she call our hospital and discuss your pet’s case with the Radiation Oncologist. In some tumor locations, especially for suspected brain tumors, a biopsy diagnosis is not required for consideration of radiation therapy.

At the time of your appointment, the radiation oncologists will discuss the additional tests that are recommended or required prior to radiation treatment, the options and expected outcomes for radiation therapy, and the costs and potential side effects associated with treatment.

Cost Estimates for Radiation Therapy

  • Palliative radiation therapy (typically 1-6 treatments): $750-3000
  • Half-body radiation therapy (for lymphoma): $1250 per half
  • Definitive course of radiation therapy (if no CT scan required; typically 15-19 daily treatments): $4000-5000
  • Course of radiation therapy delivered with intensity-modulated radiation therapy (IMRT) (typically 18-20 daily treatments): $6000-7500
  • Course of stereotactic radiation therapy (SRT) (typically 1-3 treatments delivered over 1-5 weekdays): $5500-6500


Click Here for current Clinical Trial opportunities.

We are committed to providing outstanding care for pets, their families, and their referring/primary care veterinarians.  The Radiation Oncology service consists of three board-certified radiation oncologists, Drs. Mike Nolan, Tracy Gieger, Hiroto Yoshikawa  and two residents, Drs. Leanne Magestro and Krista Kelsey, two dedicated patient care nurses, an anesthetist, two radiation therapists, a consulting medical physicist, and a research technician.


Radiation Oncologists

Dr. Tracy Gieger

Dr. Gieger earned her DVM from Louisiana State University, and is board certified in THREE medical specialties: Internal Medicine, Medical Oncology and Radiation Oncology. She worked in a mix of both private specialty hospitals and university-based veterinary teaching hospitals before joining NC State last year. Aside from bringing a wealth of cancer-related expertise to our clinic, Dr. Gieger also has a variety of interests and hobbies outside of work, including reading, fashion and home decorating, crafting cocktails and cooking.


Dr. Mike Nolan

Dr. Nolan earned his DVM from the Virginia-Maryland Regional College of Veterinary Medicine, is board-certified in Radiation Oncology, and has a Ph.D. in radiation and cancer biology from Colorado State University. When not in the clinic or classroom, Dr. Nolan runs a busy research program. Outside the office, he enjoys running, hiking, traveling and all things related to the water.



Dr. Hiroto Yoshikawa

Dr. Yoshikawa earned his veterinary degree (B.V.Sc.) from Gifu University in Japan, and gained experience in a private practice and emergency clinic. He then spent a year at the University of Saskatchewan (Canada) and 8 years working on a Ph.D., completing a residency, and serving as assistant professor at Colorado State University. Dr. Yoshikawa has a strong research interest in radiation/cancer biology, especially in the areas of brain cancer, cancer stem cells, and radiation physics. When outside of work, he loves gardening, playing soccer, photography, and spending weekends in the mountains.



Medical Physicist

Dr. Don Roback

Dr. Don Roback has a Ph.D. in physics from the University of Minnesota. He works full-time at a local human cancer clinic, and is a part-time consultant for NC State, serving as our medical physicist. He is responsible for the technical aspects of the radiation treatment equipment, and quality assurance testing. In his spare time, he shows his dogs in obedience and agility.

nc state veterinarian

Radiation Oncology Residents

Dr. Leanne Magestro

Dr. Magestro earned her DVM from NC State University and stayed close by to complete an internship at Veterinary Specialty Hospital of the Carolinas. She returned to NC State as a resident in Radiation Oncology in July of 2015. When the weather is nice, she enjoys cycling and endurance running. She hopes to run the Disney Marathon to celebrate the completion of her residency!

nc state veterinarian
Dr. Krista Kelsey

Dr. Kelsey earned her DVM from the University of Tennessee, then moved to Gainesville to complete an internship at the University of Florida. She joined us as our new resident in July 2014. She enjoys spending time with her husband, 2 cats and 2 dogs, and her hobbies include trail running, road biking, kayaking, tubing, charity runs and socializing.


Radiation Therapists & Clinical Technicians

  • Tammy Hawkes

    Tammy is a registered veterinary technician; she earned her AAS in Veterinary Technology from the State University of New York, Delhi. She has been working for NC State Radiation Oncology for more than 10 years, and has been a vital link between the original Radiation Oncology program and our newly revamped program! She has 2 Pit Bulls, enjoy traveling and is a huge Gators fan…don’t worry too much though, as long as they’re not playing UF, Tammy quietly roots for the Pack too!

  • Colleen Walsh

    Colleen is a graduate of Cambridge Institute of Allied Health & Technology with a degree in Radiation Therapy. She is registered nationally with the American Registry of Radiologic Technologists in radiation therapy. She just recently moved to the Triangle, and joined our service in September 2014. In her free time she enjoys traveling and all things outdoors!

  • Beth Piojda

    Beth is a registered veterinary technician, who has been in the field for more than 20 years, and has been an anesthesia technician at NC State since 1998. Though she’s been working with us for much of the past year as a member of the Anesthesia Service, she officially joined the Radiation Oncology Service in August 2014. We are so excited to have her! Outside of work, Beth enjoys family time with her husband, daughter (who is just starting college), and 2 Pit Bull Terriers. They have a small menagerie of animals including a moderate flock of chickens, goats, a horse and 3 cats. She also enjoys cooking, art/photography, and canoeing. She loves the NC mountains, and spending long weekends in the Fall camping on the NC coast.

  • Janelle Burnette

    Janelle is a registered veterinary technician; she obtained her AAS in veterinary technology from St. Petersburg College in 2008. She started working at the vet school in 2010 in the anesthesia department, and recently started working with the radiation oncology group in 2014. Outside of work, Janelle enjoys time with her husband, whippet, and yellow-footed tortoise. Her hobbies include running, motorcycling, needlework, and playing music (bass clarinet, bass guitar, and baritone). Janelle and her husband love visiting family in the mountains of NC, but also try to get to the Outer Banks as much as possible!

  • Kristen Price

    Kristen Price is a registered veterinary technician; she obtained her AAS from Central Carolina Community College. When not caring for our patients, Kristen enjoys spending time with her family (including her husband, daughter and 2 dogs), hiking in the mountains, all things Disney, and music. In fact, Kristin is no amateur musician; she has a Bachelor’s of Music degree from Appalachian State University, and is treated trained on clarinet and violin. She currently plays in the string section of the Lee County Community Orchestra.

  • Karen Marcus

    Karen is a technician in Dr. Nolan’s research laboratory. She is originally from Louisiana, but has called the Triangle home for more than 10 years. She has extensive experience performing animal studies and molecular biology experiments – skills that really help our research to move forward!


Client Care Coordinators

Leslie Lucia

Leslie obtained her AAS in medical office administration from Wake Technical Community College. She has worked for the College of Veterinary Medicine for almost four years and is proud to be a part of the Wolfpack family. Leslie has four animals of her own which include a dog, cat, bird, and lizard. In her spare time, Leslie enjoys spending time with her family, cooking, reading, and quilting.


Pamela Ballentine

Pamela has over 21 years of experience in client relations and medical reception services, and has worked at the College of Veterinary Medicine for the past 14 years. She takes pride in providing excellent customer service. Pam loves animals, and has a very cute and precious kitty. Her name is Kit, who was rescued here at the vet school when she was 2 weeks old. Pam also loves spending time with family, traveling, helping others and volunteering at church.

Ryan Hutchison

Ryan came to NC State Veterinary Hospital with 13 years of experience in human medicine. He is extremely excited to be working with leading physicians and staff in veterinary medicine. In his spare time Ryan enjoys working out at the gym, doing yoga, reading and visiting with close friends. And, of course, spending time with his Russian Blue cat named Cosmo. Go Wolf Pack!

We interact on a daily basis with other services in the hospital, including medical oncology, surgery, neurology, internal medicine, diagnostic imaging and anesthesiology. Learn more about our team by reading our newsletter: Radiating Hope.

The Radiation Oncology Section at NC State strives to

  • Provide clients and patients with the most thoughtful and thorough care possible by facilitating a multi-disciplinary approach to cancer management, and by offering treatments that maximize accessibility, effectiveness and efficiency.
  • Advance knowledge by serving as an educational resource for basic and cutting-edge therapeutic interventions in veterinary radiation oncology.
  • Develop and maintain an international reputation as leaders in veterinary and comparative radiation oncology, by discovering ways to improve the safety and efficacy of treatments for a variety of cancers and chronic inflammatory diseases.
Radiation Oncology Development Fund:
Contributions to this fund support students, staff, and residents within the Radiation Oncology group. These resources are vital to research, training, education and outreach. Your gift helps us fulfill our mission. For detailed information on how to support our Radiation Oncology service, read our newsletter: Radiating Hope or contact Allison Crouch, Executive Director at 919-513-6427 or e-mail her at allison_crouch@ncsu.edu. 
Support the Radiation Oncology Development Fund!

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NC State Veterinary Hospital
1052 William Moore Dr.
Raleigh, NC 27607